LV8702V SANYO [Sanyo Semicon Device], LV8702V Datasheet
LV8702V
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LV8702V Summary of contents
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... LV8702V Overview The LV8702V is a 2-channel Full-bridge driver IC that can drive a stepping motor driver, which is capable of micro- step drive and supports quarter step. Current is controlled according to motor load and rotational speed at half step, half step full-torque and quarter step excitation, thereby highly efficient drive is realized. Consequently, the reduction of power consumption, heat generation, vibration and noise is achieved ...
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... DST1, DST2, MONI, SST pin saturation voltage Charge pump VG output voltage VG Rise time tONG Oscillator frequency Fosc LV8702V Conditions Conditions ST = ”L” ”H” ”L”, STEP = ”L”, non-load -1mA Design certification Design certification 2.5A, Source-side Ron 2.5A, Sink-side Ron VM = 32V ...
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... Package Dimensions unit : mm (typ) 3285B TOP VIEW 15 0.65 0.22 (0.68) SIDE VIEW LV8702V SIDE VIEW BOTTOM VIEW 0.2 SANYO : SSOP44J(275mil) Pd max -- Ta 6.0 Four-layer circuit board *1 5.5 5.0 Four-layer circuit board *2 4.0 3.8 3.0 2.0 1.0 *1 With components mounted on the exposed die-pad board *2 With no components mounted on the exposed die-pad board 0 --40 -- ...
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... Substrate specifications (Substrate recommended for operation of LV8702V) Size : 90mm × 90mm × 1.6mm (Four-layer substrate) Material : Glass epoxy Copper wiring density : 90% L1: Copper wiring pattern diagram L3: GND layer Cautions 1) The data for the case with the Exposed Die-Pad substrate mounted shows the values when 90% or more of the Exposed Die-Pad is wet ...
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... CP1 GMG2 GMG1 GAD STEP RST ADIN MD2 MD1 VREG5 DST2 DST1 MONI SST CHOP VREF SGND LV8702V LV8702V Top view PGND1 41 OUT1A 40 OUT1A 39 VM1 38 VM1 37 RF1 36 ...
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... Block Diagram VM Charge pump PGND regulator VREG5 MONI + attenuat - VREF CHOP Oscillator TSD LVS SGND LV8702V Output control logic - + Current (W1-2/1-2/ 1-2Full/2) Signal Signal High-efficient drive ctrl logic processor2 processor1 - + Current (W1-2/1-2/ 1-2Full/2) SST DST1 DST2 No.A2121-6/24 ...
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... RF1 1ch current sense resistor connection pin 38, 39 VM1 1ch motor power supply connection pin 40, 41 OUT1A 1ch OUTA output pin 42 PGND1 1ch power GND 43 VG Capacitor connection pin for charge pump 44 VM Motor power supply connection pin LV8702V Description No.A2121-7/24 ...
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... OUT2B 28, 29 VM2 30, 31 RF2 32, 33 OUT2A 34, 35 OUT1B 36, 37 RF1 38, 39 VM1 40, 41 OUT1A 42 PGND1 GND LV8702V Equivalent Circuit VREG5 10kΩ 100kΩ GND VREG5 20kΩ 10kΩ 80kΩ GND 10kΩ 25 ...
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... Continued from preceding page. Pin No. Pin name 2 CP2 VREG5 3 CP1 VREF 14 VREG5 15 DST2 16 DST1 17 MONI 19 SST LV8702V Equivalent Circuit 3 GND VREG5 500Ω GND VM GND VREG5 100kΩ GND 44 2 100Ω 2kΩ 80kΩ 26kΩ Continued on next page. No.A2121-9/24 43 ...
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... Continued from preceding page. Pin No. Pin name 20 CHOP 1 SWOUT 11 ADIN 22 SGND LV8702V Equivalent Circuit VREG5 GND VM PGND1 PGND2 VM 2kΩ 100kΩ GND 500Ω 500Ω 2pF 2pF No.A2121-10/24 ...
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... STEP) STEP Tds1 → (MD STEP) (STEP MD1/ MD2 FR OE (GAD GAD GMG1/ GMG2 GST1/ GST2 LV8702V Internal regulator Standby Operation Operation mode Standby mode Excitation step forward Excitation step keep Tsteph Tstepl Tdh1 → MD) Tds1 Tdh1 → → (FR STEP) (STEP ...
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... Initial position When RST pin = “H”, the excitation position of the output is set to the initial position forcibly and MONI output is turned on. And then by setting RST = “L”, the excitation position moves forward with the next step signal. LV8702V Operation mode Normal operation ...
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... H The position of excitation mode is set to the initial position when power is supplied and 2) counter is reset in each excitation mode. During full step excitation mode, high-efficient drive function is turned off even when GAD = “H”. LV8702V Operation mode Output OFF Output ON Excitation mode ...
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... The blanking time avoids noise at mode switch. During the blanking time, even if noise is generated in sense resistor, a mode does not switch from CHARGE to DECAY. In this IC, the blanking time is fixed to approximately 1μs. LV8702V CW CCW ...
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... Setting current ration in each excitation mode STEP quarter step (%) 1ch 2ch θ0 100 θ θ θ θ4 0 100 LV8702V , θ2 (full step, half step full-torque) θ 2ch phase current ratio (%) half step (%) half step full-torque (%) 1ch 2ch 1ch 0 100 ...
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... The example of current waveform in each excitation mode full step excitation (CW mode) STEP MONI (%) 100 l1 0 -100 (%) 100 I2 0 -100 half step excitation full-torque (CW mode) STEP MONI (%) 100 I1 0 -100 (%) 100 I2 0 -100 LV8702V No.A2121-16/24 ...
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... STEP MONI (%) 100 I1 0 -100 (%) 100 I2 0 -100 quarter step excitation (CW mode) STEP MONI (%) 100 I1 0 -100 (%) 100 I2 0 -100 LV8702V No.A2121-17/24 ...
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... Above operations are repeated. Normally, the SLOW (+FAST) DECAY mode continues in the Triangle wave increasing direction, then entering the FAST DECAY mode till the current is attenuated to the set level and followed by the SLOW DECAY mode. LV8702V Setting current FAST CHARGE ...
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... L or OPEN L or OPEN This is a function to increase I OUT rapidly as soon as a possible stepping out is detected due to load variation during high efficiency drive. LV8702V Operation mode Normal mode High-efficient mode (except for full step excitation mode) Operating conditions HB motor/no-load ...
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... Half step excitation), you can suppress boost-up by lowering Ra1. Moreover, you can achieve high efficiency at lower speed of 1500pps or lower by increasing resistance for Ra1 (HB motor: Half step excitation). Although it depends on a usage motor, step-out is detectable at higher speed rotation by attaching smaller resistor for Ra1. LV8702V Setting Increase of Iout {(VREF/5)/RF resistance} × ...
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... DST2/DST1 pins are turned on in the following statuses: Error status Short is detected in 1ch side. Short is detected in 2ch side. When overheat is detected. LV8702V Status Normal status Step-out status *1(this function is enabled only in high-efficient drive) Small step-out margin status *2(this function is enabled only in high-efficient drive) ...
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... SST 1) With STEP signal where Rref1 = 30kΩ, Rref2 = 68kΩ and Rsst = 5kΩ VREF1 = 5V×30kΩ/(68k+30kΩ) ≈ 1.53V Where VREF1 = 1.53V, I OUT = VREF/5/0.22Ω ≈ 1.39A LV8702V tONG Fg. VG pin voltage Motor stop Rotation "Hi-Z" "L" ...
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... Calculation for each constant setting according to the above circuit diagram is as follows. 1) Constant current (100%) setting VREF = 5V×30kΩ/(68kΩ + 30kΩ) ≈ 1.53V When VREF = 1.53V : I OUT = VREF/5/0.22Ω ≈ 1.39A LV8702V 1 SWOUT 2 CP2 3 CP1 4 GMG2 5 ...
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... SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellectual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of October, 2012. Specifications and information herein are subject to change without notice. LV8702V PS No.A2121-24/24 ...